Mail server attack

Discussion in 'Server Operation' started by princebenin, Nov 18, 2007.

  1. princebenin

    princebenin New Member

    Hello,

    In spite of the installation of "Blockhost" "I still continuous be the target of attack, can someone help me?.

    Extract of /var/log/auth.log
    Code:
    Nov 18 13:32:32 myserver saslauthd[2620]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:32:34 myserver saslauthd[2620]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:32:34 myserver saslauthd[2620]: do_auth         : auth failure: [user=passwd] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:32:40 myserver saslauthd[2622]: (pam_unix) check pass; user unknown
    Nov 18 13:32:40 myserver saslauthd[2622]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:32:42 myserver saslauthd[2622]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:32:42 myserver saslauthd[2622]: do_auth         : auth failure: [user=123456] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:32:47 myserver saslauthd[2618]: (pam_unix) check pass; user unknown
    Nov 18 13:32:47 myserver saslauthd[2618]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:32:49 myserver saslauthd[2618]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:32:49 myserver saslauthd[2618]: do_auth         : auth failure: [user=newpass] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:32:53 myserver saslauthd[2619]: (pam_unix) check pass; user unknown
    Nov 18 13:32:53 myserver saslauthd[2619]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:32:55 myserver saslauthd[2619]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:32:55 myserver saslauthd[2619]: do_auth         : auth failure: [user=notused] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:33:01 myserver saslauthd[2621]: (pam_unix) check pass; user unknown
    Nov 18 13:33:01 myserver saslauthd[2621]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:33:02 myserver saslauthd[2621]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:33:01 myserver saslauthd[2621]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:33:02 myserver saslauthd[2621]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:33:02 myserver saslauthd[2621]: do_auth         : auth failure: [user=Hockey] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:33:08 myserver saslauthd[2620]: (pam_unix) check pass; user unknown
    Nov 18 13:33:08 myserver saslauthd[2620]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:33:10 myserver saslauthd[2620]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:33:10 myserver saslauthd[2620]: do_auth         : auth failure: [user=internet] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:33:15 myserver saslauthd[2622]: (pam_unix) check pass; user unknown
    Nov 18 13:33:15 myserver saslauthd[2622]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:33:17 myserver saslauthd[2622]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:33:17 myserver saslauthd[2622]: do_auth         : auth failure: [user=*******] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:33:23 myserver saslauthd[2619]: (pam_unix) check pass; user unknown
    Nov 18 13:33:23 myserver saslauthd[2619]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:33:25 myserver saslauthd[2619]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    Nov 18 13:33:25 myserver saslauthd[2619]: do_auth         : auth failure: [user=Maddock] [service=smtp] [realm=] [mech=pam] [reason=PAM auth error]
    Nov 18 13:33:30 myserver saslauthd[2618]: (pam_unix) check pass; user unknown
    Nov 18 13:33:30 myserver saslauthd[2618]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
    Nov 18 13:33:32 myserver saslauthd[2618]: DEBUG: auth_pam: pam_authenticate failed: User not known to the underlying authentication module
    

    Extract of my file /var/log/mail.info
    Code:
    Nov 18 15:18:42 myserver postfix/smtpd[31185]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:18:43 myserver postfix/smtpd[31185]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:18:49 myserver postfix/smtpd[31248]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:18:49 myserver postfix/smtpd[31183]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:18:50 myserver postfix/smtpd[31248]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:18:57 myserver postfix/smtpd[31183]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:18:57 myserver postfix/smtpd[30761]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:18:58 myserver postfix/smtpd[31183]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:04 myserver postfix/smtpd[30761]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:19:04 myserver postfix/smtpd[31188]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:05 myserver postfix/smtpd[30761]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:11 myserver postfix/smtpd[31188]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:19:12 myserver postfix/smtpd[31185]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:13 myserver postfix/smtpd[31188]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:28 myserver postfix/smtpd[30761]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:34 myserver postfix/smtpd[31248]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:35 myserver postfix/smtpd[31188]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:19:36 myserver postfix/smtpd[31188]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:42 myserver postfix/smtpd[31248]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:19:42 myserver postfix/smtpd[31183]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:43 myserver postfix/smtpd[31248]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:49 myserver postfix/smtpd[31183]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:19:50 myserver postfix/smtpd[31185]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:50 myserver postfix/smtpd[31183]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:57 myserver postfix/smtpd[31248]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:19:57 myserver postfix/smtpd[31185]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:19:58 myserver postfix/smtpd[31185]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:20:04 myserver postfix/smtpd[31183]: connect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    Nov 18 15:20:05 myserver postfix/smtpd[31248]: warning: 65.106.203.226.ptr.us.xo.net[65.106.203.226]: SASL LOGIN authentication failed: authentication failure
    Nov 18 15:20:06 myserver postfix/smtpd[31248]: disconnect from 65.106.203.226.ptr.us.xo.net[65.106.203.226]
    
     
  2. falko

    falko Super Moderator ISPConfig Developer

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